Carbureting apparatus for lighters



Nov. 17, 1931. s. RAsMUssEN CARBURETING APPARATUS FOR LGHTERS Filed June'7, 1928 Patented Nov. 17, 1931 UNITED STATES 'SOPHUS RASMUSSEN, OFALBERT'VLEA, MINNESOTA CARBURETING APPARATUS: FOByIqIGjI-ITEBSApplication filed June 7, 19,28. Serial No. 283,640.

This invention relates to a stove adapted to use liquid hydrocarbonfuel, and particularly to a lighting device for such a stove. Suchstoves are now used in large numbers and it has heretofore beennecessary to start said stoves by heating a vaporizingmember comprisedltherein by means of a priming charge of fuel, or by means of a'separatetorch. This lighting operation has been a lo necessary preliminaryoperation to light the main burners of the stove and` has been one ofthe objections to such stoves, It-.is desirable to have a stovestructure which can be lighted at once by an ordinary match withwV outthe use of a torch or other separate means by a priming device of thevaporizing member.

It is an object of this invention, therefore,

to provide a simple and efficient structure of a stove using avaporizing fuel, by means Qf which the stove can be lighted with anordinary match without any preliminary heating of the vaporizing memberby priming or by a separate means, such as a torch.

It is a further object of the invention to provide a structure of stoveusing liquid vaporzing fuel having a burner and a- Vaporizing member forsaid burner, together with means for furnishing a combustibleI mixtureto said burner for heating said vaporizing member, whereby said` burnercan be instantly lighted with an ordinary matchor other lighting device.v

It is a further object of the invention to provide av structure of stoveusing liquid vaporizingfuel comprising one orino're main burners, avaporizing member therefor, a fuel tank adapted to contain the fuelunder pressure to which said vaporizing member is connected, and meansconnected to said fuel tank adapted to receive and discharge acombustible mixture which can be instantly lighted to heat saidvaporizing member.

It is more specifically an object ofthe in vention toV provide astructure of stoveusing liquid vaporizing fuel and having `one or moremain burners, a vaporizing member for said burners connected toa fuelVtank `adapted to contain a fuel under pressure, austarting burner of theretort type for heating Vsaid vaprorizing` member, and means connectedto said'starting burner and fuel tank, adapted to supply a charge of acombustible mixture which can be instantly lighted to start saidauxiliary burner. v

These. and other objects and advantages ofthe invention will be fullysetforth in the following description made in connection with theaccompanying drawings, in which like reference characters refer tosimilar parts throughout the several views and in whichzi Fig. 1 is apartial plan view of the stove having, the invention applied thereto, asindicated by the arrows;

Fig. V2 is a vertical section taken on line 2)-2 of Fig. 1 as indicatedby the arrows;

Fig. 3 is a vertical section taken on line 3-3 of Fig. 1 as indicated bythe arrows;

Fig. 4 is a view similar to Fig. 3 showing a modification; and V Fig. 5is a vertical section taken on line 5-5 of Fig. 4, Figs. l and 5 beingshown on an enlarged scale.

Referring to the drawings, a stove. isshown having a frame comprisingthe top plate 10 and the supporting frame 11 to whichv said top issecured. A fuel tank 12 is shown, disposed at one end of the frame 11and secured therete by straps 13 extending around the tank and securedto said frame, One of the main burners ofthe stove is shown as 14,connected to a mixing chamber l5 a portion of which is shown and whichis secured to the top plate 10 by the screws 16. A vaporizing member ortube 17 connects with mixing chamber 15 at one end and projects througha frame 11 at one end, the same being connected Vto the tank 12 by asmall tube or conduit 18 which is connected to a fixture 19 secured intank 12. Vaporzing tubeV 17 is controlled so as to be opened or closedand supply or shutoff fuel to mixing chamber 15 respectively, by

a valve having an `operating hand wheel 17a.

Saidlixture co'mprisesa gauge 2O adapted to .n

'show the pressure thatthe fuel is under in tank 12 and is also providedwith a valve operated by hand wheel 21.

' An auxiliaryV burner for heating the. va-' porizing tube 17 isprovided, and whlethis Yso burner may be disposed in various places, itis shown as disposed between mixing chamber 15 and burner 14 andindicated generally at 22. rEhis burner comprises a mixing chamber 22aillustrated as a curved conduit having an open upper end into whichprojects a small vaporizing tube 226 connected to a valve body 24 havingtherein a valve 25 for opening and closing tube 226, which valve isoperated by the hand wheel 26. The valve 'bod7 24 has a fiange thereonconnected to the frame 11 by headed and nutted bolts 27 and has adepending lug in which is secured and from which projects a rod 28forming a support for mixing chamber 22a. The member 22a has a loweropening 220 disposed below vaporizing tube 226 and vaporizing tube 17,from which the lflame of said burner projects. The conduit connectingmixing chamber 15 and burner 14 has a pan 23 therein, adapted to catchany overflow from burner 22 and return the same to the mixing chamber15.

A small tube or conduit 29 connects valve body 24 to a valve body oriixture 30 secured to the bottom of tank 12 by being threaded into aplug 31 secured to and extending into said tank. Valve body 30 has apassage 30a extending therethrough, controlled by a valve stem member31a which is in turn operated by the hand wheel 32. The stem 31a ispacked by a cap 33 threaded onto body 30, adapted to compress packing 34against the end of said body and about said stem. It will be noted thatstem 31a has a valve portion 316 engaging a portion of passage 30a asthe valve seat. A small tube 35 is threaded into the top of body 30 andin the portion extending through plug 31, which tube 35 has an openupper end which is disposed in the air space in tank 12 as indicated inFig. 3. The tube 35 has a small aperture 35a adjacent its bottom andadjacent member 30 which is disposed in the gasoline or fuel in tank 12and affords communication of tube 35 with said fuel. Aperture 35a issurrounded by a fine screen 36 shown as cylindrical in form, surroundinga portion of valve body 30 at its lower end and a cylindrical portion37a of an upstanding member 37 at its upper end, which member 37 fitstube 35 and is secured to body 30.

In the operation of the structure described, when the stove is not inuse, all of the valves describet are closed. The fuel is thus shutoiffrom both the burner 22 and burner 14 and vaporizing tube 17. When thestove is to be lighted, valve wheel 32 will be turned, thus openingpassage 30a and valve wheel 26 will be turned to open communication withthe burner 22 and small vaporizing tube 226. A small amount of fuelpasses into tube 35 through opening 35a and when the said valves areopen, the pressure of air in tank 12 forces this fuel through passage30a through tube 29 to valve body 24, and through tube 226.

This passage of this air and fuel forms a combustible mixture, whichmixture is discharged at the end of tube 226 passing into mixing chamber22a, and the same can be at once lighted at the opening 22e. t is notnecessary to preliminarily heat the Vaporizing tube 226, but the burnercan be lighted as soon as the valve controlling the same is opened.rThis initial charge of combustible mixture furnishes suiiicient flameto heat the vaporizing tube 226 and as fuel continues to ilow throughthis tube from tank 12 through conduit 29, the burner will. continue inoperation, thus heating vaporizing tube 17. 1`he burner 22 1s onlyburned for a very short period, after which valve wheel 17a is operatedto permit fuel to pass through vaporizing tube 17 to the mixing chamber15. This fuel is vaporized, mixed with air in chamber 15, and isdelivered to burner 14 which can now be lighted. After the main burner14 is lighted, valve wheels 26 and 32 are again turned to close valves25 and 31. The stove now continues in operation until it is desired toshut on the main burners, which is done by closing the vaporizing tube17 by turning hand wheel 17a. It is thus seen that no vaporizing memberhas to be heated by holding a torth thereunder, or holding a matchthereunder, and it is not necessary to use a small separate supply ofgasoline to be ignited under th yaporizing tube to heat the same. Theburner 22 can be instantly lighted and continued in operation for a veryshort period, after which the main burners can be lighted.

In the modification shown in Fig. 4, the structure is the same asdescribed, except that conduit 29 is connected to a valve bodyl orfixture 38. rhis body has a passage 38a therethrough closed by a valveportion 39a on a valve stem 39 threaded in valve body 38 and operated byvalve wheel 40. The valve stem 39 is packed by a cap or shell 41threaded thereon and which compresses packing 42 against the end of body38 and aoout valve stem 39. The valve body 38 is secured to the bottomof the tank 12 by being threaded into a plug 44 iitted in said tank andextending thereinto. A. tube 43 is secured `in the top of body 38 andhas an open upper end disposed in the air space in tank 12. A passage386 extends downward in member 38 and communicates with passage 33a'.Said passage 336 communicates with passage 38a through the sinaliopening 380 and valve stem 39 has a reduced portion 396 extending fromthe valve portion 39a and having a conical end adapted to project intoopening A plug 4G is threaded into the top of member 3S, having apassage therethrough con1 municating with the passage 336, which plughas a reduced portion at its upper end surrounded b a screen cap 45which is of cylindrical orm and fits on plug 44.

lldu

In the operation of the device shown in Figs. 4l and 5, when the stoveis to be started, valve 39a will be opened by turning hand wheel 40. Thevalve 25 will also be opened by turning valve wheel 26. Gasoline willApass into passage 38?) through the screen 45 and to the valve 39a. Thenthis valve is opened, this gasoline will be forced out through passage38a by the pressure of air in tube 4:3 and this air passing through thetube with said gasoline or fuel will form a combustible mixture whichwill be discharged into the burner 22. This burner therefore can belighted at once with an ordinary match. After the combustible mixture isconsumed, the gasoline or fuelcontinues t0 flow from tank l2 throughpassage 385 so that burner 22 continues in operation. This burner, asstated above, burns only for a short period so as to heat vaporizingtube 17, after which hand wheel 17a is turned to admit fuel through thevaporizing tube 17 to the main burners. The main burners are now lightedand valves 25 and 39a then closed. The main burners are now continued inoperation as long as desired and will be extinguished when no longerneeded, by turning valve wheel 17 a. The screens 36 and 45 prevent anysolid or foreign matter entering the small passages 30a or 38?)respectively. The portion 380 with its pointed end keeps the openingbetween passage 886 and 38a open.

From the above description it is seen that applicant has provided quitea simple and efficient structure by means of which the stove can beinstantly lighted without the preliminary heating of any vaporizingmember. The objectionable operation of priming the stove orpreliminarily heating the same by a torch is eliminated. The improvedstructure is quite simple, involving few parts, and the same are easilymanipulated. The device has been amply demonstrated in actual practiceand found to be very successful and eiicient.

It will, of course, be understood that various changes may be made inthe form, details, arrangement and proportions of the parts, withoutdeparting from the scope of appli- -cants invention, which, generallystated, consists in a device capable of carrying out the objects aboveset forth, in the novel parts and combinations of parts disclosed anddefined in the appended claim.

W hat is claimed is A lighting device for a liquid hydrocarbonV saidvalve body and passage and projecting upwardly in said fuel tank, havingan open upper end disposed in the air space in said tank, said tubehaving a small aperture therein adj acentsaid valve body, a tubeconnecting said valve body and passage to said auxiliary burner, and avalve for controlling said auxiliary burner.

1n testimony whereof I aiiix my signature.

SOPHUS RASMUSSEN.

